Is the 'Penrose Pattern' Used
In Kleenex's Toilet Paper?

LONDON -- Sir Roger Penrose has seen his work on quantum physics and relativity theory celebrated in countless papers. But it was toilet paper that really got the renowned mathematician's attention.

When Sir Roger examined the "Kleenex quilted toilet tissue," made by the British unit of Kimberly-Clark Corp., what he saw was no ordinary piece of toilet paper. Embossed on the surface he discovered a series of interlocking diamonds. They bore an uncanny resemblance to "the Penrose Pattern," a highly...